Chemistry · EQUILIBRIUM

When the reaction \( \text{H}_2(\text{g}) + \text{I}_2(\text{g}) \rightleftharpoons 2\text{HI}(\text{g}) \) reaches equilibrium starting from \( 1.0\text{ mol} \) of \( \text{H}_2 \) and \( 1.0\text{ mol} \) of \( \text{I}_2 \) in a closed container, or starting from \( 2.0\text{ mol} \) of pure \( \text{HI} \) in the same container at the same temperature, which parameter will be identical in both equilibrium states?

1. Only the value of \( K_c \), while the equilibrium concentrations differ
2. Only the forward reaction rate, but not the equilibrium concentrations
3. The equilibrium concentrations of all individual chemical species and the value of \( K_c \)
4. The initial rates of reaction in both approaches